html {
  -webkit-overflow-scrolling: touch;
}

/* loading */
.lds-roller {
  display: inline-block;
  position: relative;
  width: 80rpx;
  height: 80rpx;
}

.lds-roller div {
  animation: lds-roller 1.2s cubic-bezier(0.5, 0, 0.5, 1) infinite;
  transform-origin: 40rpx 40rpx;
}

.lds-roller div:after {
  content: " ";
  display: block;
  position: absolute;
  width: 7rpx;
  height: 7rpx;
  border-radius: 50%;
  background: yellow;
  margin: -4rpx 0 0 -4rpx;
}

.lds-roller div:nth-child(1) {
  animation-delay: -0.036s;
}

.lds-roller div:nth-child(1):after {
  top: 63rpx;
  left: 63rpx;
}

.lds-roller div:nth-child(2) {
  animation-delay: -0.072s;
}

.lds-roller div:nth-child(2):after {
  top: 68rpx;
  left: 56rpx;
}

.lds-roller div:nth-child(3) {
  animation-delay: -0.108s;
}

.lds-roller div:nth-child(3):after {
  top: 71rpx;
  left: 48rpx;
}

.lds-roller div:nth-child(4) {
  animation-delay: -0.144s;
}

.lds-roller div:nth-child(4):after {
  top: 72rpx;
  left: 40rpx;
}

.lds-roller div:nth-child(5) {
  animation-delay: -0.18s;
}

.lds-roller div:nth-child(5):after {
  top: 71rpx;
  left: 32rpx;
}

.lds-roller div:nth-child(6) {
  animation-delay: -0.216s;
}

.lds-roller div:nth-child(6):after {
  top: 68rpx;
  left: 24rpx;
}

.lds-roller div:nth-child(7) {
  animation-delay: -0.252s;
}

.lds-roller div:nth-child(7):after {
  top: 63rpx;
  left: 17rpx;
}

.lds-roller div:nth-child(8) {
  animation-delay: -0.288s;
}

.lds-roller div:nth-child(8):after {
  top: 56rpx;
  left: 12rpx;
}

@keyframes lds-roller {
  0% {
    transform: rotate(0deg);
  }

  100% {
    transform: rotate(360deg);
  }
}
